Alarm-whistle



P. A. WOOD.

ALARM WHISTLE.

APPLICATION FILED my 13. I919.

Patented Jan. 18, 1921 UNITED STATES PATENT OFFICE.

PINCKNEY A. WOOD, OF BROOKLYN, NEW YORK.

ALARM-WHISTLE.

Application filed May 13.

T 0 all whom it may concern 1 Be it known that I, PINOKNEY A. Woon, a citizen of the United States, and resident of Brookl n, in the county of Kings and State of ew York, have invented certain new and useful Improvementsin Alarm- VVhistles, of which the following is a specification.

This invention relates to an alarm whistle for internal combustion engines, in which the pressure from the explosions in the engine are utilized tooperate the whistle.

The invention has for an object to provide an improved alarm whistle of this type in which operation of the whistle does not interfere with the proper functioning of the en ine cylinder to which it may be attached.

or further comprehension of the invention and of the objects and advantages thereof, reference will be had to the following description andaccompanying drawings and to the appended claims in which the various novel features of the invention are more particularly. set forth.

Figure 1 of the drawings is a side elevation of an alarm whistle constructed ac cording to my invention.

Fig. 2 is a longitudinal axial vertical sectional view thereof.

Fig. 3 is a face view of the whistle pro er.

ig. 4 is a horizontal section on the line 44 of Fig. 2.

As here shown m improved whistle comprises a short tubu ar casting 1, having an integral elbow 2. A continuous passage 3 leads from the lower end of the casting 1 through the elbow 2. The upper end of the casting is bored into this passage to accommodate and uide a valve stem 4, which extends througi the casting 1 and has a valve 5 on its lower end adapted to seat upwardly on the bottom of the casting and. close the mouth of thepassage 3. I

The valve 5 is inclosed in a chamber 6 formed by a sleeve 7 screwed at one end on the lower end of the casting 1 and having a nipple 8 screwed in its lower end whereby it ma be connected to any engine cylinder or ot er suitable part of an internal combustion engine.

The whistle may be conveniently mounted on an engine by removing the pr1ming cup from, one of its cylinders and screwing the nipple 8 into its place.

Specification of Letters Patent.

1919. Serial No. 296,771.

The valve 5 is normally pressed against its seat by an expansion spring 9 surrounding the projecting upper end of the stem 4: and bearing between the top of the casting 1 and a pin 10 fixed in the stem.

The valve 5 may be depressed to admit the gases to the whistle proper, to bepresently described, bya lever 11 i'ulcrumed as at 12 to a bifurcated post 13 on the top of the casting 1 and having an end 11 projecting over the top of the valve stem 4. The lever may have'loosely held thereon a ring 14 which may be inserted in a notch 15 to hold the valve open (as shown in Fig. 2) when desired, as when the car is left unattended. The lever may be operated by a suitablecord or wire, not shown, which is secured to the end thereof and leads to a point convenient to the driver.

The whistle proper comprises an outwardly and upwardly flaring cup 16. having at its lower end a neck 17 screwed into the elbow 2. The enlarged upper end of this cup 16 is screwed in turn unto the bottom of a short cylindrical cap 18 having a closed top 18. pon this cap 18 is mounted in turn a longer cylindrical shell 20 having a closed top and constituting the sound chamber of the whistle.

The base of the cap 18 is formed with an exterior circular flange 21 with which the shell 20 engages thus providing a space between the cylindrical walls of the cap 18 and shell 20 above said flange. A horizontally elongated opening 22 is formed in the shell, the bottom of said opening being slightly below the top of the cap 18. A slightly smaller opening 23 is formed in the cap just below the opening 22.

Seating on the upper end of the neck 17 is a valve 25 having a stem 26 which projects through and is guided in the top 18' of the cap 18 the valve being yieldingly held on its seat by a coiled spring 27 which surrounds the stem 26 and bears between the valve 25 and the top 18.

When the whistle is to be sounded the lever 11 is pulled, depressing stem 4 and opening valve 5, allowing the gases from the engine to flow through the passage 3 and through the whistle proper, lifting valve 25 from its seat.

The valve 25 opens and closes with each piston stroke and prevents air being drawn in through the whistle to the cylinder of Patented Jan. 18, 1921.

the engine, the proper functioning of the cylinder being in noWise interfered with by the operation of my improved whistle.

If it is desired to set the whistle in open position the ring 14: may be moved by hand into the notch 15, thus leaving the whistle in condition to sound it the engine is started, the spring 9 causing the lever to press against the ring and retain it in the notch."

By pulling the lever upward slightly the ring 14 is released from the notch and the valve maybe allowed to close.

The relation of the openings and to each other may be adjusted laterally and. vertically to vary the tone of the whistle. For instance, the shell 20 may be turned on the screw 50 through the slot 51. and also may be lowered through the vertical slot 53. Hence it is possible to obtain a large variety of distinctive tones and when the valve is latched in the open position this forms a ready means for audibly detecting the use of a particular car by unauthorized persons. V

Having thus described my invention, 1 claim:

1. A device oi the class described con1 prising an element having a passage leading therethrough and adapted to be connected at one end to the cylinder of an internal combustion engine, a manually operable valve controlling said passage, an outwardly and upwardly flaring cup having a neck connected to the other end ol said passage, the top of said heel; forming a valve seat, a cap carried on lhe up per end of said cap, a valve seating on said valve seat and having a stem guided by the said cap, said valve being held yiel b ingly on its seat, a shell surrounding and spaced from said cap, said shell lbrining a sound chamber, and said cap and shell being formed with egress openings.

2. A device of the class de;-1 'i'il2ed ('i' lllprising an element having a pan-sage leading therethrough and adapted to be eonnei'l ed at one end. to the cylinder oi an inn-rnal combustion engine, a manually operable valve controlling said passage, an out wardlv and upwardly flaring eup having a neek connected to the other end of sa id pawns. the top oi said neck lorniinp a valve seal. a cap carried on the upper end oi. said (lip-ll valve seating on said valve seat and having a stem guided by the said cap, said valve being held yieldingly on its seat. a shell surrounding and spaeed from said cap, said shell forming a sound elnnnber. and said cap and shell being formed with egress openings, the opening in lhe cap being just below the opening in. the shell.

Signed at New York, in the county of New York and State of: New York, this 8th day of May, A. D. 19l9.

PINCKNEY A. \V 001).

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